64843750 has 36 divisors (see below), whose sum is σ = 123046812. Its totient is φ = 25625000.

The previous prime is 64843741. The next prime is 64843759. The reversal of 64843750 is 5734846.

It is an interprime number because it is at equal distance from previous prime (64843741) and next prime (64843759).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64843759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 781209 + ... + 781291.

It is an arithmetic number, because the mean of its divisors is an integer number (3417967).

Almost surely, 2^64843750 is an apocalyptic number.

64843750 is a deficient number, since it is larger than the sum of its proper divisors (58203062).

64843750 is an frugal number, since it uses more digits than its factorization.

64843750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 64843750 is about 8052.5617042032. The cubic root of 64843750 is about 401.7501438234.

The spelling of 64843750 in words is "sixty-four million, eight hundred forty-three thousand, seven hundred fifty".